Astudent bikes to school by traveling first dn = 1.00 miles north, then dw = 0.600 miles west, and finally ds = 0.200 miles south. take the north direction as the positive  y  direction and east as positive  x. the origin is still where the student starts biking. let  d⃗  n  be the displacement vector corresponding to the first leg of the student's trip. express  d⃗  n  in component form

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?